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ATX motherboard with large VRM heatsinks and CPU in AM5 socket

ASUS

ASUS PRIME X870-P WIFI + Ryzen 9 9900X3D CPU AMD motherboard combo

SKU CH-EJTE-NEH3P

Socket AM5 motherboard and 12-core Ryzen CPU with 128MB L3 cache, DDR5 to 192GB, PCIe 5.0 x16 and M.2, Wi-Fi 7, 2.5Gb Ethernet, USB4 40Gbps

  • ChipsetAMD X870
  • Number of Memory Slots4x288pin (DDR5)
  • Memory StandardDDR5 4400
  • Maximum Memory Supported192GB
  • Channel SupportedDual Channel
  • ECC SupportedYes

model PRIME X870-P WIFI

+CPU + Ryzen 9 9900X3D

  • Stable power for heavy workloads with 14+2+1 80A DrMOS stages
  • Faster wireless networking via Wi-Fi 7 and Bluetooth 5.4
  • High-speed storage ready with PCIe 5.0 M.2 and x16 slots
  • AI-ready compute from Ryzen 9 9900X3D with 128MB L3 cache
  • Easy build experience using Q-Release, Q-Latch and pre-mounted I/O shield

Ready for AI workloads

This motherboard and CPU combo pairs the ASUS PRIME X870-P WIFI with the AMD Ryzen 9 9900X3D processor. The board uses the AMD X870 chipset and AM5 socket to support Ryzen 9000, 8000 and 7000 series chips. It targets builders who need high multi-thread throughput for AI inference, content creation and heavy multitasking. Four DDR5 slots accept up to 192 GB of memory.

Sustained power delivery

The 14+2+1 80A DrMOS power stages sit on an 8-layer PCB with ProCool connectors, alloy chokes and durable capacitors. A large VRM heatsink, dual M.2 heatsinks and a PCH heatsink work with Fan Xpert 4 and AI Cooling II to keep temperatures stable during long compute sessions. The 120 W Zen 5 CPU with 128 MB L3 cache maintains high clocks without thermal throttling.

DIY-friendly assembly

A pre-mounted I/O shield, Q-Antenna, PCIe Slot Q-Release and M.2 Q-Latch reduce installation steps. BIOS FlashBack updates firmware without a CPU installed. Q-Dashboard and Q-LED Core give clear post-code feedback if a component is not seated correctly. The flexible M.2 heatsink fits 2280 drives without forcing the board layout.

Highlights

  • Stable power for heavy workloads with 14+2+1 80A DrMOS stages
  • Faster wireless networking via Wi-Fi 7 and Bluetooth 5.4
  • High-speed storage ready with PCIe 5.0 M.2 and x16 slots
  • AI-ready compute from Ryzen 9 9900X3D with 128MB L3 cache
  • Easy build experience using Q-Release, Q-Latch and pre-mounted I/O shield

Specifications

BrandASUS
ModelPRIME X870-P WIFI+R9 9900X3D
ChipsetAMD X870
Number of Memory Slots4x288pin (DDR5)
Memory StandardDDR5 4400
Maximum Memory Supported192GB
Channel SupportedDual Channel
ECC SupportedYes
Buffer SupportedUn-buffered
Memory FeatureSupports up to 8000+MT/s(OC) with Ryzen 9000 & 8000 & 7000 Series Processors
ECC and Non-ECC, Un-buffered DIMM*
Dual channel memory architecture
Supports AMD Extended Profiles for Overclocking (EXPO)
ASUS Enhanced Memory Profile (AEMP)
* Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.
PCI Express 5.0 x16AMD Ryzen 9000 & 7000 Series Desktop Processors
1 x PCIe 5.0 x16 slot (supports x16 mode)
PCI Express 4.0 x16AMD Ryzen 8000 Series Desktop Processors
1 x PCIe 4.0 x16 slot (supports x8/x4 mode)
AMD X870 Chipset
3 x PCIe 4.0 x16 slots (support x1 mode)***
*** PCIEX16(G4)_1 shares bandwidth with M.2_2. PCIEX16(G4)_1 will be disabled when M.2_2 runs.
*** PCIEX16(G4)_2 and PCIEX16(G4)_3 share bandwidth with M.2_3. PCIEX16(G4)_2 and PCIEX16(G4)_3 will be disabled when M.2_3 runs.
Serial ATA (SATA)2 x SATA 6Gb/s
M.2AMD Ryzen 9000 & 7000 Series Desktop Processors
M.2_1 slot (Key M), type 2280 (supports PCIe 5.0 x4 mode)
AMD Ryzen 8000 Series Desktop Processors
M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
AMD X870 Chipset
M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)**
M.2_3 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)***
M.2_4 slot (Key M), type 2280 (supports PCIe 3.0 x2 mode)****
** PCIEX16(G4)_1 shares bandwidth with M.2_2. PCIEX16(G4)_1 will be disabled when M.2_2 runs.
*** PCIEX16(G4)_2 and PCIEX16(G4)_3 share bandwidth with M.2_3. PCIEX16(G4)_2 and
SATA RAID* AMD RAIDXpert2 Technology supports both PCIe RAID 0/1/5/10 and SATA RAID 0/1. RAID 5 Function is only supportted by AMD Ryzen 9000 series CPU.
Audio ChipsetRealtek 7.1 Surround Sound High Definition Audio CODEC*
- Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
- Supports up to 24-Bit/192 kHz playback
Audio Features
- Audio Shielding
- Premium audio capacitors
- Dedicated audio PCB layers
* A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.
Audio Channels7.1 Channels
Max LAN Speed2.5Gbps
Wireless LANWi-Fi 802.11 be
BluetoothBluetooth 5.4
Back I/O Ports2 x USB4 (40Gbps) ports (2 x USB Type-C)
1 x USB 10Gbps port (1 x Type-A)
3 x USB 5Gbps ports (3 x Type-A)
4 x USB 2.0 ports (4 x Type-A)
1 x HDMI port
1 x Wi-Fi module
1 x Realtek 2.5Gb Ethernet port
3 x Audio jacks
1 x BIOS FlashBack button
Onboard USB1 x USB 10Gbps connector (supports USB Type-C)
1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
2 x USB 2.0 headers support 4 additional USB 2.0 ports
Other ConnectorsFan and Cooling Related
1 x 4-pin CPU Fan header
1 x 4-pin CPU OPT Fan header
1 x 4-pin AIO Pump header
4 x 4-pin Chassis Fan headers
Miscellaneous
3 x Addressable Gen2 headers
1 x Clear CMOS header
1 x COM Port header
1 x Front Panel Audio header (F_AUDIO)
1 x S/PDIF Out header
1 x SPI TPM header (14-1 pin)
1 x 10-1 pin System Panel header
Form FactorATX
Dimensions (W x L)12.0" x 9.6"
Power Pin1 x 24-pin Main Power connector
2 x 8-pin +12V CPU Power connectors
BIOS Feature256 Mb Flash ROM, UEFI AMI BIOS
Windows 11Supported
FeaturesASUS 5X PROTECTION III
- DIGI+ VRM (- Digital power design with DrMOS)
- LANGuard
- Overvoltage protection
- SafeSlot
- Stainless-steel back I/O
ASUS Q-Design
- M.2 Q-Latch
- PCIe Slot Q-Release
- Q-Antenna
- Q-Dashboard
- Q-DIMM
- Q-LED Core
- Q-Slot
ASUS Thermal Solution
- Flexible M.2 heatsink
- VRM heatsink design
ASUS EZ DIY
- BIOS FlashBack button
- BIOS FlashBack LED
- ProCool
- Pre-mounted I/O shield
- SafeSlot
Aura Sync
- Addressable Gen2 headers
Package Contents1 x AMD Ryzen 9 9900X3D CPU
1 x Shin-Etsu X-23-7921-5 (1.8g)
Cables
2 x SATA 6Gb/s cables
Miscellaneous
1 x ASUS WiFi Q-Antenna
1 x M.2 rubber package
2 x Screw packages for M.2 SSD
Documentation
1 x Quick start guide

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Will the 14+2+1 80A DrMOS power stages handle the 120W Ryzen 9 9900X3D without extra cooling?

The board uses 14+2+1 80A DrMOS stages on an 8-layer PCB with a large VRM heatsink and AI Cooling II fan control, which together provide stable delivery for the 120W CPU under sustained load.

Can I run four DDR5 modules at 8000 MT/s with this CPU?

The motherboard supports up to 8000+ MT/s via EXPO on Ryzen 9000 series, but stability at that speed with four populated slots depends on the memory kit and CPU silicon quality; testing is recommended.

Does the PCIe 5.0 x16 slot share bandwidth with any M.2 slot?

The primary PCIe 5.0 x16 slot runs at x16 from the CPU and does not share bandwidth; the chipset PCIe 4.0 x16 slot shares bandwidth with M.2_2, not the top graphics slot.

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